---
schema_version: "1"
id: b4eff8dd9789c76681d0b2daf8313b9b91defe8bbe6489b4777083042a193d50
title: Fields on Event Relation
collection: legacydeveloper
version: current
locale: en-us
portal_url: https://docs.salesforce.com/legacydeveloper/current/en-us/life_sciences_dev_guide/lsc_sforce_api_objects_eventattendee.md
canonical_url: https://developer.salesforce.com/docs/atlas.en-us.life_sciences_dev_guide.meta/life_sciences_dev_guide/lsc_sforce_api_objects_eventattendee.htm
source_site: developer.salesforce.com
content_type: documentation
content_hash: 8796ef6d658b5bece2bda548a537bf7ff7922c20564bcd5afa56bcf17960530f
description: Life Sciences Cloud fields extend the standard Event Relation object to represent a person (a user, lead, or contact) or a resource (such as a conference room) invited to an event.
---
# Fields on Event Relation

Life Sciences Cloud fields extend the standard Event Relation object to represent a person (a user, lead, or contact) or a resource (such as a conference room) invited to an event.

## Supported Calls

create(), delete(), describeSObjects(), getDeleted(), getUpdated(), query(), retrieve(), update(), upsert()

#### See Also

- [_Object Reference for the Salesforce Platform_: EventRelation](https://developer.salesforce.com/docs/atlas.en-us.264.0.object_reference.meta/object_reference/sforce_api_objects_eventattendee.htm)

## Fields

### EventId

- **Type**: reference
- **Properties**: Create, Filter, Group, Sort
- **Description**: Contains the ID of the event. This value can’t be changed after it’s been specified.
    
    This is a relationship field.
- **Relationship Name**: Event
- **Relationship Type**: Lookup
- **Refers To**: Event

### RelationId

- **Type**: reference
- **Properties**: Create, Filter, Group, Sort
- **Description**: Contains the ID of the person (User, Contact, or Lead) or the resource invited to an event. When Shared Activities is enabled, RelationId can also contain the ID of an account, opportunity, or other object related to an event.
    
    This value can’t be changed after it’s been specified.
    
    This is a polymorphic relationship field.
- **Relationship Name**: Relation
- **Relationship Type**: Lookup
- **Refers To**: Calendar, Contact, Lead, User